ico_shangjiantou_white_down.xml

<?xml version="1.0" encoding="utf-8"?>

<rotate xmlns:android="http://schemas.android.com/apk/res/android"

    android:drawable="@drawable/ico_shangjiantou_white"

    android:visible="true"

    android:fromDegrees="-180"

    android:toDegrees="0"

    android:pivotX="50%"

    android:pivotY="50%">

</rotate>